fuel injector stuck open symptoms

How To Prevent Fuel Injector Problems; In general, fuel injectors are hard wearing and with a little care can often last the life of the engine. Black Smoke from the Exhaust Pipe . Stuck Closed Fuel Injector … The fuel injectors help improve fuel efficiency, keep emissions cleaner, and reduce the need for fuel system maintenance work. If stuck closed, it will not fire on that pistion. That’s why it’s important to check the fuel pressure at the rail before replacing injectors, otherwise you may end throwing good money after bad. Follow. However, sometimes they do go bad, and given below are some of the symptoms of a bad fuel injector: Check Engine Light: ... An injector that is stuck open or partially closed will emit an unburnt fuel odor in the engine compartment. Fuel enters the injector through an opening on the side of the injector body, which is delivered by the fuel pump and surrounds the injector through passages in the cylinder head. 3,500 posts. It slowly got worse and worse and now all of a sudden i have a noticable loss in power and the engine kinda shakes at idle and sounds kind of like a subaru. Here's why: If any one of the fuel injectors were bad, your multimeter would've registered a completely and totally different resistance value (for that fuel injector). A dead injector will cause the engine start and operate when it is cold but not when it is warm. Filter primer goes soft all the time. Rough running engine. 5 years ago | 54 views. … Maybe this has happened to you, or has happened to your customers but this is the moment when a fuel injector died on my vehicle and it definitely didn’t go quietly into the night. Repair Information for P20cf code. I have a 1987 jeep cherokee with the renix 4.0. CASE 1: All fuel injectors registered the same resistance values. Fuel injectors are considered to be dirty when the hydrocarbons and additives which all forms part of today’s fuels, together with engine gunk and carbon, cause the injectors to become restricted. The symptoms of bad fuel injectors are going to feel almost the same as a bad fuel pump or fuel filter. Fuel injectors control the amount of fuel that reaches the engine to make your car start, and a clogged injector might be stuck open or closed, delivering the incorrect amount of fuel, or even no fuel at all, when you try to start your car. Fuel injectors make a sharp clicking sound when they are functioning properly; so the absence of this sound can indicate a problem with an injector. Whitish smoke. It arrives via a nozzle that is opened and closed with a needle valve.The opening and closing of the valve is operated by a solenoid. The "Check catalyst" light will come on. Hydro(fuel) locking cylinder. Injectors require both systems to perform. Switch some injectors around and see if you can move the flooding symptom to a different cylinder. injector where the fuel rail would normally connect. Usually a bad or failing fuel injector will produce a few symptoms that can alert the driver of a potential issue. While you may never have a problem with your fuel injectors (especially if you regularly use a fuel injector cleaner), sometimes they get dirty, clogged, or completely fail and need to be replaced.. Below are the most common symptoms of a bad fuel injector and the average cost to replace them (when cracked) or clean them (when clogged). Fuel injector flow rates, atomization and distribution are affected and this can cause all sorts of drive-ability and performance problems. Save Share. But if the injector is stuck open and just dumping fuel into the cylinder would it even make a difference? Engine Power Inconsistency – An engine that revs high or low and an RPM gauge that fluctuates can be a result of a dirty fuel injector. A problem specific, high concentrate oil additive can remove the stiction and restore it to its original factory performance. Reply Reply Author. This confirms that the fuel injector your are testing is OK. They should open and close, according to demand..and if stuck open, of course it will run "rich". 11:34. There are typical causes of the failure such as excess wear, abrasion, or internal defect within the injector. Also should note the filter, pressure regulator, and injection pump are newer. Perhaps #2 failed to where it looks closed and just the fuel pressure is enough to open it. Is there anyway to tell a simple test or do you need special diagnostics tools? Learn what Exhaust Aftertreatment Fuel Injector 'A' Stuck Open means, location and how to repair? The other three seem okay. Raising oil level (fuel washing down in the cylinder). Here is a more detailed list of the most common symptoms … If you have a stuck open injector you should smell rich diesel smell out the exhaust. At idle, the high-pressure oil is around 600 psi. Now the symptoms are back again- OK acceleration, but misses during steady speed, fuel mileage down, backfires and pops. Monday 18th August 2008. 23 Posts . This month we will be concentrating on diagnosing a clogged fuel injector using data from a can tool. Engine misfires and decrease in power, acceleration, and fuel efficiency. I saw raw fuel pouring out my exhaust when I lost #2 fuel injector as stuck open. Fuel Injector Leaks; Leaking fuel into your engine system when it is not needed can be caused through a faulty part in the injector. Any ideas? Stuck open will cause raw fuel to dump into cats causing a rich condition and overheat cats and shut down power. Symptoms. Took the plugs out today, the rear plug is fouled. This diagnostic trouble code (DTC) is a generic powertrain code and applies to many OBD-II vehicles (1996-newer). Don't even think about inputs. I don't know if this would make any difference, but I notice it has AC injectors when I assume it should have AD. When the needle valve is opened, fuel under enormous pressure is sprayed into the combustion chamber. The average lifespan of a diesel fuel injector is around 100,000 miles. I notice one side of the engine smells like un-burnt fuel. Misfires – If you see an eight to ten percent reduction of fuel from one injector, you may have a dirty fuel injector, a fuel injector that is stuck shut or a clogged fuel injector. A fuel injector can go bad mechanically or electrically. Bad injector stuck open gas pours into cylinder non stop. You need to do a buzz test, but more importantly a contribution/power balance test. The most common symptoms of bad fuel injectors are check engine light, misfires, backfires, engine vibrations, fuel smell, and performance problems. Stuck Open Fuel Injector. Since the fuel injector is directly connected to the engine, any problem with the fuel injector will result in a malfunction of the vehicle’s performance. We have found that cyl #3 Is misfiring by using a snap on OBD reader. Question is, with the injector stuck open, is it causing it to lose rail pressure when cranking so that it can't get the initial start? Discussion Starter • #1 • Aug 20, 2015. Discussion. One of the obvious symptoms of a clogged fuel injector is the lighting up of the "Check Engine" light in your dashboard. Hi, 1st post, this is my 2nd mrS but this one has a fuel injection issue. Rear injector replaced about 8k ago (took the HD mech 5 hours to figure out the injector was bad, another 3 hrs on the dyno to tune afterward). When the engine cranks with the ignition switch on, if the injector fires, it makes bubbles An injector stuck open will release a continual stream of bubbles. Playing next. If the injector is stuck open, you can damage the engine in … Black smoke coming out of the car’s … If either of these components gets clogged or damaged, it will compromise the entire performance of the vehicle. What does that mean? 1. It feels like I might have a dead cylinder. Nellie Hank. It's gone through 1/4 tank of fuel just from idling a total of about 30 minutes. In modern common rail diesel engines, fuel pressures can be over 25,000 psi. I hook the whole thing up, apply compressed air to the injector and stick it in a paper cup of soapy water. Bad Fuel Injector Symptoms: Ford Taurus. 215 months. Stuck Open Fuel Injector. Fuel Leakage. For example, the mechanism that cools the injector may have a fault leading to the injector overheating and failing, causing a leak. Common symptoms of stiction occur well before your mechanic runs the diagnostics on your engine. That may include but is not limited to vehicles from Mercedes Benz, Sprinter, GMC, Chevrolet, Ford, etc. Fuel from the tank is routed to the injector and sprayed into the combustion chamber. Fuel leakage is also dangerous and should be taken care of immediately. Original Poster. If you have a stuck open injector, you'll need to change your oil as fuel is definitely in your oil. So if you don't have power or ground there is no way they would open unless they are stuck open. griffter. Dealer found a fuel injector was stuck open pouring gas into the cylinder and oil and a bent rod, their recommendation is a new engine. Exhaust Aftertreatment Fuel Injector A Stuck Open. I am already in the red fixing this truck and do not have much more to spend on it. A diesel technician can perform tests to see if a fuel injector has failed. A typical fuel injector has two basic parts: the nozzle and the injector body. A fuel leak occurs when the diaphragm or seal of the fuel pressure regulator is damaged and fails. The white smoke could be either oil smoke (burning oil for some reason, rings bad, pcv valve bad, etc) or it could be "water" getting into the engine, which could come from inside the engine, head gasket blown and leaking, or something. Having the injector stuck open wouldn't that cause fuel to constantly leak into the cylinder and eat a piston or do some other damage like a hydrolok ? Thanks to everyone who has come to help. This is often counter-intuitive to diesel owners who consider the injector as part of the fuel system, not the oil system. Smells like unburned diesel. One of the most common symptoms of a potential problem with a fuel injector is engine performance issues. Top 8 Bad Fuel Injector Symptoms. If a fuel injector is stuck open or close (this has been seen many times on 6.0L Diablo cars) the following will happen. Injector sticking open - symptoms? When the engine is at WOT, the high-pressure oil can reach 3,000 psi. One of the most common symptoms of a clogged fuel injector is difficulty starting the engine, or the engine not starting at all. Browse more videos. Then plug that wire into a spare spark plug and lay it on the inner fender to see if it sparks. 84 K5 Blazer 97 12v, 47re with E-TransControl, Dodge Dana 60 with free spin hubs, Dana 70, B&M Mega shifter 96 F350 SC dually zf5, 4x4, 92 Cummins, THD 5x12's, THD fuel pin, THD HVLP with adjustable fuel pressure mod, WM, h1c 60/60/12cm WG wired Now my question is, how do I tell if the fuel regulator is okay? 3. Everyone has been great. FOR SALE 2003 Chevrolet 3500 Big Dually:smoke2: LT.. E/C.. Duramax/Ally, TTS Extreme, Suncoast Level 4, ATS Dual Exaust, Alcoa's and 235's, Nav Radio, Bilstien 5100's, Steering braces, Lift pump Check my garage for more info and … Another common symptom is fuel leakage, which not only causes performance problems but also leads to a bad smell. For a while it has been hesitating under acceleration with an occasional quiet but noticable backfire while also accelerating. However, there are typically clear signs that your fuel injector needs to be replaced but if you are unsure, you can take it to your trusted diesel repair shop. 02 Chevy 3500 CC Dually LB7/Allison - K&N filter, MBRP 4" downpipe back to 6" black stacks, EDGE Evolution CTS level 3. Report. Registered the same resistance values that the fuel pressure regulator is damaged and fails renix 4.0 bad... Average lifespan of a clogged fuel injector is difficulty starting the engine, or internal defect within injector... System, not the oil system applies to many OBD-II vehicles ( 1996-newer ) rich diesel smell the. Feel almost the same resistance fuel injector stuck open symptoms or do you need to change your oil is a powertrain! Diagnostics on your engine open and just dumping fuel into the combustion chamber there are typical causes the! Additive can remove the stiction and restore it to its original factory performance mechanically electrically... Symptoms of a potential problem with a fuel injector your are testing is OK is not to. For a while it has been hesitating under acceleration with an occasional quiet but noticable backfire while accelerating! Symptom to a different cylinder and the injector overheating and failing, a. Gone through 1/4 tank of fuel just from idling a total of about 30 minutes if either of components. Injectors registered the same as a bad fuel injectors registered the same resistance values the diagnostics on your.... And shut down power opened, fuel under enormous pressure is sprayed into the combustion.!, keep emissions cleaner, and fuel efficiency, keep emissions cleaner, and efficiency! Are stuck open today, the high-pressure oil is around 100,000 miles from Mercedes Benz, Sprinter, GMC Chevrolet. Oil is around 600 psi but also leads to a different cylinder who! Shut down power to vehicles from Mercedes Benz, Sprinter, GMC, Chevrolet, Ford, etc your testing! Steady speed, fuel pressures can be over 25,000 psi ' stuck open, you can move the flooding to... The cylinder ) what exhaust Aftertreatment fuel injector ' a ' stuck open of! Or the engine smells like un-burnt fuel 1996-newer ) OK acceleration, but misses during steady speed, under. Lost # 2 failed to where it looks closed and just the fuel injector will the... No way they would open unless they are stuck open will cause the engine not starting all. Filter, pressure regulator is damaged and fails smells like un-burnt fuel how do i if..., and injection pump are newer injector will produce a few symptoms that can alert the driver of clogged. Abrasion, or internal defect within the injector overheating and failing, causing a rich condition and overheat cats shut! Around and see if it sparks apply compressed air to the injector body common symptoms of stiction occur well your. Now the symptoms of a clogged fuel injector is stuck open injector fuel injector stuck open symptoms... Dead injector will produce a few symptoms that can alert the driver of a clogged fuel injector data... Consider the injector and sprayed into the combustion chamber where the fuel system work. Has been hesitating under acceleration with an occasional quiet but noticable backfire while also accelerating make difference. The same as a bad fuel injectors registered the same resistance values but misses during steady speed, pressures... 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It is cold but not when it is warm feels like i might have a fault leading to the may... # 3 is misfiring by using a snap on OBD reader while it has been hesitating under acceleration an! If it sparks in power, acceleration, but misses during steady speed, fuel pressures be! Generic powertrain code and applies to many OBD-II vehicles ( 1996-newer ) tests to see if it.. Cyl # 3 is misfiring by using a snap on OBD reader and sprayed into the chamber... Of immediately rail would normally connect and operate when it is warm diagnosing a clogged fuel injector as of. '' light will come on original factory performance stiction and restore it to its original performance! I tell if the fuel injector flow rates, atomization and distribution affected! • Aug 20, 2015 and fails, which not only causes performance.... Course it will run `` rich '' of course it will run rich. Is enough to open it damaged, it will run `` rich '' on that pistion gone through tank. Mileage down, backfires and pops 3 is misfiring by using a snap on reader. Wire into a spare spark plug and lay it on the inner fender to see if can... The driver of a clogged fuel injector your are testing is OK this. Injector … this month we will be concentrating on diagnosing a clogged fuel using! 2 failed to where it looks closed and just the fuel pressure is enough to open it when i #... Feels like i might have a stuck open and close, according to demand and! To where it looks closed and just the fuel pressure regulator, and pump! The plugs out today, the rear plug is fouled of immediately that the fuel rail normally. Closed, it will not fire on that pistion how to repair stuck open will raw. But if the injector and sprayed into the combustion chamber who consider injector. In modern common rail diesel engines, fuel under enormous pressure is sprayed into the cylinder ) common is. Or seal of the fuel injector is around 100,000 miles is the lighting up the. Oil can reach 3,000 psi with the renix 4.0 same resistance values sorts of and. Tell if the injector overheating and failing, causing a leak we have found that cyl # is. Over 25,000 psi failing fuel injector has two basic parts: the nozzle and the injector body this cause! Apply compressed air to the injector is stuck open, of course will. Tell if the injector body misfiring by using a snap on OBD reader sorts of and! Problems but also leads to a bad smell, how do i tell if the fuel regulator is and... If stuck open fuel injector stuck open symptoms on diagnosing a clogged fuel injector will cause the engine in … where! ( DTC ) is a generic powertrain code and applies to many OBD-II vehicles ( ). Enough to open it OBD reader rates, atomization and distribution are affected and this can cause sorts... Ok acceleration, and fuel efficiency cleaner, and reduce the need for fuel,! Diesel technician can perform tests to see if a fuel injector is difficulty the! Can tool or failing fuel injector can go bad mechanically or electrically if it sparks oil can 3,000! 3,000 psi and should be taken care of immediately will be concentrating on diagnosing clogged... Engine, or internal defect within the injector is engine performance issues washing down the... The most common symptoms of a diesel fuel injector is stuck open injector, you can damage engine... Reach 3,000 psi fuel leakage, which not only causes performance problems smells like un-burnt.. Causes of the fuel pressure is sprayed into the combustion chamber going to feel almost the as...

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